HP Cisco MDS 9222i Cisco MDS 9000 Family CLI Configuration Guide, Release 3.x - Page 287

Chapter 10 Managing System Hardware About Module Temperature Send documentation comments to [email protected] Note To reactivate the external crossbar module, you must remove and reinsert or replace the crossbar module. • You must enter the EXEC mode out-of-service module command for a graceful shutdown of integrated crossbars on the supervisor module in a Cisco MDS 9506 or 9509 Director. out-of-service module slot Where slot indicates the chassis slot number on either the Supervisor-1 module or the Supervisor-2 module in which the integrated crossbar resides. Note To reactivate the integrated crossbar, you must remove and reinsert or replace the Supervisor-1 module or Supervisor-2 module. Caution Taking the crossbar out-of-service may cause a supervisor switchover. Backward Compatibility for Generation 1 Modules in Cisco MDS 9513 Directors To provide backward compatibility for a Generation 1 module in a Cisco MDS 9513 chassis, the active and backup Supervisor-2 modules are associated to a specific crossbar module. The Supervisor-2 module in slot 7 is associated with crossbar module 1 and Supervisor-2 module in slot 8 is associated with crossbar module 2. You must plan for the following operational considerations before removing crossbar modules: • Whenever a crossbar module associated with the active Supervisor-2 module goes offline or is brought online in a system that is already online, a stateful supervisor switchover occurs. This switchover does not disrupt traffic. Events that cause a crossbar module to go offline include the following: - Out-of-service requests - Physical removal - Errors • Supervisor-2 module switchovers do not occur if the crossbar switching module associated with the backup Supervisor-2 module goes offline. Note Supervisor-2 module switchovers do not occur when removing crossbar switch modules on a Cisco MDS 9513 that only has Generation 2 modules installed. About Module Temperature Built-in, automatic sensors are provided in all switches in the Cisco MDS 9000 Family to monitor your switch at all times. Each module (switching and supervisor) has four sensors: 1 (outlet sensor), 2 (intake sensor), 3 (onboard sensor), and 4 (onboard sensor). Each sensor has two thresholds (in degrees Celsius): minor and major. OL-16184-01, Cisco MDS SAN-OS Release 3.x Cisco MDS 9000 Family CLI Configuration Guide 10-15